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Reports <code>equals()</code> being called to compare a <code>String</code> with an empty string.
In this case, using <code>.isEmpty()</code> is better as it shows you exactly what you're checking.
<p><b>Example:</b></p>
<pre><code>
  void checkString(String s){
    if ("".equals(s)) throw new IllegalArgumentException();
  }
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  void checkString(String s){
    if (s != null && s.isEmpty()) throw new IllegalArgumentException();
  }
</code></pre>
<!-- tooltip end -->
<p>
  <code>"".equals(str)</code> returns false when <code>str</code> is null. For safety, this inspection's quick-fix inserts an explicit
  null-check when
  the <code>equals()</code> argument is nullable. Use the option to make the inspection ignore such cases.
</p>
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